Equations practice problems - page 84 of 237
Number of problems found: 4721
- Alcohol solutions
We have to produce 2 liters of 60% alcohol from 55% and 80%. How many of these will we use in the solution? - Trees
Two-fifths of the trees in the orchard are apple trees, one-sixth a pear. The remaining 26 trees are cherries. How many pears are in the orchard? - The stadion
John can run around a circular track in 20 seconds and Eddie in 30 seconds. Two seconds after Eddie starts, John starts from the same place in the opposite direction. When will they meet? - The cylinder
In a rotating cylinder, it is given: the surface of the shell (without bases) S = 96 cm² and the volume V = 192 cm cubic. Calculate the radius and height of this cylinder. - Rotary cylinder
In the rotary cylinder, it is given: surface S = 96 cm² and volume V = 192 cm cubic. Calculate its radius and height. - Two grandmothers
Two grandmothers went to the market to sell eggs, and they had 100. When they sold all the eggs, they made the same money. The first grandmother said to the second, "If I sold my eggs for your price, I would earn 15 crowns. " The other grandmother replied - Calculate 38563
Six equally powerful machines produce 870 parts in 14 hours. Calculate in how many hours 870 parts will have four such machines.
- Equation 25
Solve the following simple equation: 3/4(x+5)=1/2(x+9) - The average height
The average height of six friends is 181 cm. Peter came among them, which reduced the average height by 2 cm. Calculate Peter's height. - Solution 38451 Prepare 2 liters (kg) of a 3% salt solution in water.
- Solution 38411
Prepare 250g of a 30% solution of hydrogen peroxide in water. - Salicylic 38401
Prepare 600 g of an 8% solution of salicylic acid. - Solution 38391 Prepare 100g of a 15% blue rock solution.
- Lions
If eight lions are 40%, how many would 75% be? - Arm and base
The isosceles triangle has a circumference of 46 cm. If the arm is 5 cm longer than the base, calculate its area.
- Motorbike circuit
On a 2,550 m long circuit, two motorcycles go at such speeds that they meet every minute if they go against each other and run every 5 minutes if they go in the same direction. Find their speeds. - Two ports
Two ships commute along the same route between the ports of Mumraj and Zmatek. They spend negligible time in ports, turn around immediately, and continue sailing. At the same time, a blue ship departs from the port of Mumraj, and a green ship departs from - Coloured numbers
Mussel wrote four different natural numbers with colored markers: red, blue, green, and yellow. When the red number is divided by blue, it gets the green number is an incomplete proportion, and yellow represents the remainder after this division. When it - Determine 37931
40% of the base is 1200. Determine what the base is. - Two identical five-digits
We have two identical five-digit numbers, but we don’t know which ones. When we write one before the first, and after the second one, we get two six-digit numbers, one of which is three times the other. What are the numbers?
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